This standard specifies a method for qualitatively evaluating the tendency of colorant diffusion when plastics come into contact with Miscellaneous materials. The test is performed under pressure at high temperatures and is suitable for polyvinyl chloride (PVC) (PVC) substrates. After the specimen is in contact with the receptor material (e.g. white filter paper and PVC sheet) at the specified temperature for 72 hours, the receptor material is checked for the transfer of colorants. This method is used to evaluate the Color migration of plastics in practical applications to ensure that it meets the requirements for use.